Version: Wowza Streaming Engine™ 4.11.3+11 build 20260812174529 released August 13, 2026.
Java support: Wowza Streaming Engine 4.11.0 is compiled using Java 17 (OpenJDK Java SE JRE 17.0.12) but can be used with Java versions 17 or 21. For more details, see Java version information.
New features and functionality
The WSE 4.11.3 release focuses on WebRTC bug fixes and improvements. WebRTC TURN relay now supports TCP and TLS, so users can deliver WebRTC on networks that block outbound UDP. (For example, a corporate or campus network.) A handful of WebRTC fixes come with it: TURN relay sessions no longer fail to start on a DTLS handshake timeout, handshakes now shut down cleanly when a peer drops mid-handshake instead of eating CPU, and an audio timestamp bug that caused audio gaps is gone. We also fixed a crash from creating and tearing down transcoder sessions in quick succession.
Detailed list of changes
Improvements
- WebRTC TURN relay server now supports TCP and TLS. Users can now deliver WebRTC on networks that block outbound UDP. (Previously TURN relay support was limited to UDP only.) See the WebRTC implementation guide for configuration instructions.
Bug Fixes
- Fixed a WebRTC bug where sessions using the server's configured TURN relay failed to start. The ICE connection was established but the DTLS handshake timed out, so no audio or video flowed.
- Fixed a WebRTC bug in WebRTC in which DTLS handshakes failed to terminate when the remote peer disconnected mid-handshake, consuming excessive CPU resources. Now, when the peer goes silent, the DTLS handshake aborts gracefully and logs the error.
- Fixed a WebRTC bug causing desynchronization of audio timestamps resulting audio discontinuity and downstream errors.
- Fixed a bug in which rapid creation and teardown of WSE transcoder sessions crashed the server.
- Fixed a bug in NVIDIA GPU driver version detection on Linux that caused GPU-accelerated transcoding to silently fall back to software when the driver version had only two components (e.g., 595.84).
- Resolved MPEG-DASH live stream packetizer memory leaks.
Known issues
For a detailed list of currently known issues, see Known issues with Wowza Streaming Engine.
